The patch titled Subject: acpi_memhotplug.c: auto bind the memory device which is hotplugged before the driver is loaded has been added to the -mm tree. Its filename is acpi_memhotplugc-auto-bind-the-memory-device-which-is-hotplugged-before-the-driver-is-loaded.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Wen Congyang <wency@xxxxxxxxxxxxxx> Subject: acpi_memhotplug.c: auto bind the memory device which is hotplugged before the driver is loaded If the memory device is hotplugged before the driver is loaded, the user cannot see this device under the directory /sys/bus/acpi/devices/, and the user cannot bind it by hand after the driver is loaded. This patch introduces a new feature to bind such device when the driver is being loaded. Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx> Cc: Len Brown <lenb@xxxxxxxxxx> Cc: "Brown, Len" <len.brown@xxxxxxxxx> Cc: Yasuaki ISIMATU <isimatu.yasuaki@xxxxxxxxxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/acpi/acpi_memhotplug.c | 37 ++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) diff -puN drivers/acpi/acpi_memhotplug.c~acpi_memhotplugc-auto-bind-the-memory-device-which-is-hotplugged-before-the-driver-is-loaded drivers/acpi/acpi_memhotplug.c --- a/drivers/acpi/acpi_memhotplug.c~acpi_memhotplugc-auto-bind-the-memory-device-which-is-hotplugged-before-the-driver-is-loaded +++ a/drivers/acpi/acpi_memhotplug.c @@ -52,6 +52,9 @@ MODULE_LICENSE("GPL"); #define MEMORY_POWER_ON_STATE 1 #define MEMORY_POWER_OFF_STATE 2 +static bool auto_probe; +module_param(auto_probe, bool, S_IRUGO | S_IWUSR); + static int acpi_memory_device_add(struct acpi_device *device); static int acpi_memory_device_remove(struct acpi_device *device, int type); @@ -543,12 +546,44 @@ acpi_memory_register_notify_handler(acpi u32 level, void *ctxt, void **retv) { acpi_status status; - + struct acpi_memory_device *mem_device = NULL; + unsigned long long current_status; status = is_memory_device(handle); if (ACPI_FAILURE(status)) return AE_OK; /* continue */ + if (auto_probe) { + /* Get device present/absent information from the _STA */ + status = acpi_evaluate_integer(handle, "_STA", NULL, + ¤t_status); + if (ACPI_FAILURE(status)) + goto install; + + /* + * Check for device status. Device should be + * present/enabled/functioning. + */ + if (!(current_status & + (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | + ACPI_STA_DEVICE_FUNCTIONING))) + goto install; + + if (acpi_memory_get_device(handle, &mem_device)) + goto install; + + /* We have bound this device while we register the driver */ + if (mem_device->state == MEMORY_POWER_ON_STATE) + goto install; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "\nauto probe memory device\n")); + + if (acpi_memory_enable_device(mem_device)) + pr_err(PREFIX "Cannot enable memory device\n"); + } + +install: status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, acpi_memory_device_notify, NULL); /* continue */ _ Subject: Subject: acpi_memhotplug.c: auto bind the memory device which is hotplugged before the driver is loaded Patches currently in -mm which might be from wency@xxxxxxxxxxxxxx are mm-memory_hotplugc-release-memory-resources-if-hotadd_new_pgdat-fails.patch acpi_memhotplugc-fix-memory-leak-when-memory-device-is-unbound-from-the-module-acpi_memhotplug.patch acpi_memhotplugc-free-memory-device-if-acpi_memory_enable_device-failed.patch acpi_memhotplugc-remove-memory-info-from-list-before-freeing-it.patch acpi_memhotplugc-dont-allow-to-eject-the-memory-device-if-it-is-being-used.patch acpi_memhotplugc-bind-the-memory-device-when-the-driver-is-being-loaded.patch acpi_memhotplugc-auto-bind-the-memory-device-which-is-hotplugged-before-the-driver-is-loaded.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html